(+)-DX 52-1 8,11-Iminoazepino[1,2-b]isoquinoline-10-carboxylic acid, 7-cyano-5,7,8,9,10,11,11a,12-octahydro-5-(hydroxymethyl)-4-methoxy-13-methyl-, (5R,7R,8S,10R,11R,11aS)- Antibiotic DX-52-1 DX-52-1 NSC607097 QUINOCARMYCIN ANALOG